< JRBARROZ />

A Guy that just plays with React Native & AI

Heeey, i’m Jhon! I’m happy you’re here, this is my name signed in libras → 🤙🏻 (Yeah, a hang loose). By the way i’m a professional with more than 5 years of experience, mainly on Javascript, React, React Native and Typescript. Fun fact! I love help the others and build accessible, scalable and trackable apps! Check it out my articles on @dev.io.

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300K MAU

on apps built

money-bag

78% Cost Reduction

as senior developer

sparkles

Freelance & Mentorship

let's schedule a call!

Handtalk

LifestyleEducation

I’m the Senior Developer and Mobile Tech Lead at @handtalk (opens in a new tab), leading accessibility and performance for an app recognized by the UN as the best social app worldwide. Our mission is to make Libras, ASL, and other sign languages available to everyone, using education and gamification to bridge the gap between deaf and hearing communities. I guide the team end‑to‑end—setting KPIs/OKRs, coordinating delivery, and optimizing the release pipeline—to ship fast, keep costs lean, and sustain high quality.

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+5 millions downloads

apple store & playstore

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+300k MAU

Monthly Active Users

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ONU Best Social App

Around the World

Iriom

FinanceWhitelabel

At @MB Labs (opens in a new tab) (whitelabel fintech), I was a mid level developer on a customizable banking app. I designed and implemented the feature flag architecture with Remote Config and built per client theming to scale the product across customers. For Iriom a fintech serving truckers. I partnered with design and product and led a three person squad to deliver the app on the Apple App Store and Google Play.

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+20k downloads

apple store & playstore

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+5k MAU

Monthly Active Users

T+Saúde App ACS

MobilityHealthWhitelabel

At @Tascom Tecnologia (opens in a new tab) (whitelabel healthtech), I served as the principal architect and developer for the T+Saúde ACS app. Designed with an offline-first architecture, it enables Community Health Agents to work in remote areas with limited access to electricity, water, and sanitation. Agents collect precise resident data entirely offline and later return to the health unit to synchronize records, ensuring reliable information flow and continuity of care, the main goal of primary health care.

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Offline First App

Internal App Distribution

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+37k MAU

Monthly Active Users

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396k Monthly

Offline health records synced

Ibirabike

MobilityHealthWhitelabel

At @Tascom Tecnologia (opens in a new tab) (whitelabel healthtech),i was the mobile lead of five people with the goal to develop a rental location bike that aims supply daily Ibirabike location system in all @Urbia (opens in a new tab) parks around Sao Paulo. We implemented first on Ibirapuera Park and today we have about more than 200k downloads and 62k monthly active users. And a lot of good memories of people and dogs that went to Ibirapuera! If you plan came to Sao Paulo go check out and gimme a feedback!

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200k+ downloads

apple store & playstore

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62k+ MAU

Monthly Active Users

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1 Million

of billing transactions per month

freelancers.test.ts

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SecretLetter

LifestyleEducation

SecretMail is a passion project designed to revive the experience of sending real letters. We let people craft personalized messages with custom stamps, stickers, and thoughtful details, then deliver them online, making relationships richer through small, love-filled gestures.

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Jun - 2024Nov - 2024
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Faculdade Líbano

Postgraduate in Mobile Development

Mar - 2020Mar - 2023
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Instituto Federal IFPE

Technologist in Internet Systems

Jan - 2018Jan - 2019
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Instituto Federal IFPE

Technical in Computer Science for Internet

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"Not making a decision is a big decision"

Negan | The Walking Dead

< JRBARROZ />